Skate-clamp.



L. W. BARKER.

SKATE CLAMP.

APPLICATION FILED JUNE 11. 1915.

Patented Sept. 21, 1915.

W L J Z a e i 4 Attorneys COLUMBIA PLANOmi c.

lilac SKATE-CLAMP.

Specification of Letters Patent.

PatentedSept. 21, 1915.

Application filed June 11, 1915. .Serial No. 33,620.

To all whom it may concern:

Be it known that I, LEWIS VJILEY BARKER, a subject of the King of GreatBritain, and residing at No. 96 Carleton street, Fredericton, Provinceof New Brunswick, Canada, have invented certain new and usefulTmprovements in Skate-Clamps; and I do hereby declare that the followingis a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

The invention to be hereinafter described relates to skate clamps.

In order to more clearly disclose the construction, operation, and useof the invention, reference should be had to the accompanying drawingsforming part of the present application.

Throughout the several figures of the drawings like reference charactersdesignate the same parts.

In the drawings: Figure 1. is a top plan view of the clamp; Fig. 2 is afront view of the same with one of the front bracket arms broken away;Fig. 3 is an end view of the clamp in use; and Fig. 4 is a section online 44 of Fig. 2 looking in the direction of the arrows.

The main objects of the invention are to provide a compact and etlicient(lamp for holding skates for sharpening and like purposes of simpleconstruction and operation which can be produced at a relatively lowcost and can be readily and. easily moved about as required.

Referring to the drawings in detail, the base plate 1 is provided, neareach end, with a transverse strip 2 riveted thereto and provided, in itsunder face and near each end thereof, witha recess about and concentricwith a recess l in the plate 1 through the bottom of which is a circularopening having a suitable beveled edge. These recesses form ball cagesor chambers in each of which is mounted a suitable ball bearing 3 ofsuflicient size to project slightly beyond the under face of plate 1.This provides a ball bearing mounting for the plate so that it can bereadily and easily moved about on the table of the grinding machine.

An upper'plate 4 is mounted above plate 1 and is hingedly connectedthereto, at its back edge, by means of a pin 5 passed through lugs 6carried thereby and in alinement with lugs 7 integral with plate 1. A

thumb screw 8 is threaded through plate 1, at the center of the frontthereof, and has its lower end secured by a loose nut in plate 1. Byturning the thumb screw the front of plate 4 can be raised or lowered soas to vary its inclination as desired.

Near the front of plate 4, .at each end thereof, there is secured atransverse U shaped bracket 9 the outer or front arm 9 of which isextended and is secured, at its upper end, to the lower clamp bar 10. Asecond clamp bar 11 is mounted above bar 10 and the two bars are boredand threaded at their ends to receive the thumb screws 12, the upper onebeing recessed at each end to receive a check nut 13 threaded on to theshank of the screw. By placing the skate blade between these two barsand turning the thumb screws 12 down the blade will be firmly grippedand secured in position for grinding.

The inner arm 9 of each bracket 9 is bored and threaded to receive athumb screw 14 the shank of which passes through a slOt in the stem of aT bracket 15 which is slidably mounted on the arm 9* and provided withlateral flanges inclosing the same for guiding purposes. A look nut 16is threaded on the shank of screw 14, beyond the stem of T bracket 15 sothat, by turning the thumb screw, the bracket may be firmly secured invertical adjustment. Each of the brackets 15 carries a horizontalsupporting plate 17 adapted to support the clearing plate or base of theskate, or the shoe if the skate be attached to a shoe. This effectuallyprevents any injury to the skate from strain during the sharpeningoperation. The supporting plates 17, due to their verticaladjustability, can be regulated to suit practically any type or size ofskate, as will be evident. Also the inclination of the skate blade to besharpened can be accurately adjusted by means of screw 8 thus insuring aproper and true sharpening.

In using my clamp the skate is secured in position and properlyadjusted, and the clamp is moved along the table of the grindingmachine, on the ball bearings 3, so as to bring the edge of the bladeinto engagement with the cutting face of an emery wheel, or othersuitable grinding means, as in Fig. 3.

It is thought that the construction, operation, and use of the inventionwill be clear from the preceding detailed description.

Changes may be made in the construction,

arrangement, and disposition of the several Within this applicationwherein only a pre-' ferred form has been disclosed.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is:

1. In a device of the character described, a base plate, a plate carriedthereby and adapted to have its inclination varied, means for varyingthe inclination of the said plate, clamping means carried by the secondmentioned plate, vertically adjustable supporting plates mounted in backof the said clamping means, and means for securing the said supportingplates in adjustment.

2. In a device of the character described, a base plate, a plate mountedabove the base plate and hingedly connected thereto at its back edge,means for raising or lowering j the front of the second mentioned plate,U

brackets carried by the said second plate and having their outer armsextended,

clamping means carried by the extended outer arms of the said brackets,brackets slidably mounted on the shorter arms of the said U brackets andadapted to be adjusted vertically, supporting plates carried by the saidT brackets, and means for securing the said Tbrackets in verticaladjustment.

f 3. In a device of the character described,

abase plate, ball bearings mounted in said base plate andprojectingbeyond the lower 7 face thereof, a plate mounted above the base plateand hingedly connected thereto at its back edge, means for raising'orlowering the front of the second mentioned plate, .U brackets carriedbythe said second plate and having their outer arms extended,-

clamping means carried by the extended my hand in the presence of twowitnesses.

LEWIS WILEY BARKER. Witnesses: j V

. R. M. MCLELLAN,

S W. STAPLES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. C.

